Confusion among world soccer officials and a lack of clear challengers suggest a murky path lies ahead toreplace FIFA President Sepp Blatter. He resigned yesterday as U.S. authorities confirmed they are trying to gather evidence linking him to a sweeping investigation into alleged corruption at world soccer’s governing body. Meanwhile, further doubt has been cast over whether Russia and Qatar will host the next two World Cups after losing Mr. Blatter, the strongest supporter of their bids. The Qatar stock market fell sharply today following news of his departure. But to many, his resignation couldn’t come soon enough. “Sepp Blatter was the Last Man on Earth to realize that soccer needed a de-Blattering,” writes our sports columnist Jason Gay.